Telephone for ships, mines, &amp;c.



No. 811,029. PATENTBD JAN. 30, 1906. ik?. BARDMAN.

TELEPHONE FOR SHIPS, MINES, zc.

APPLIUATION PIL-BD APR.10,1905.

lll/11 UNITE il* ySTATES PATENT OFFICE.

ARTHUR ir. RoARDMAN-Or SOMERVTLLaMASSACHUSETTS, ASSIGNOR TO ELECTRIC GAS LIGHTING COMPANY, or BOSTON, MASSACHUSETTS, `A

CORPORATION OF MAINE.

'TELEPHONE FOR SHIPS, MINES. dsc.

Specification of LettersoPatent.

Patented Jan. 3o, 1906.

T all whom, it may concern.-

Be it known that I, ARTHUR F. BOARDMAN, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful improvement in Telephones for Ships, Mines, or Under Similar Atmospheric Conditions, of which the following is a specilication.

My invention relates to telephones where used so as to be exposed to water, moisture, spray, snow, or sleet.

My invention consists in an adaptation of the parts and a combination of the same.

My invention will be plain upon reference to the drawings, in which-- Figure 1 is a yplan showing the telephonelJox swung Open and leaving the various devices exposed. Fig. 2 is a detail of thewcircuit making and breaking element or contactmaker.

Referring to the drawings, which are' approximately haltl the usual size of the apparatus, A is the telephone-holding box, usually made of brass, and B is the swinging door therefor, having the latch 6, which is clamped in position when the door is closed by the oscllating thumb-screw e. y

Within the box A is the ordinary telephonereceiver C. D is a horn Ior curved-shaped mouthpiece for the transmitter X, the curvature of the mouthpiece D being' for the purpose ot' keeping moisture away from the transmitter. The plate E is carried upon a water- .presS-buttons l, 2, 8, and 4, (and more, if desired,) are for calling various departments. F is the Contact makerv and breaker controlling,I

the talking-circuit, which in detail may he.

proof gasket, (dotted lines c.) The water-tigh t.

should preferably be a stuffing-box f of. the contact-maker and also on plate E for the telephone-cord.

When the rod f is pushed into F, the elect is to break the circuit through the springs f j and contact-ring f, as will be the case when the door B is closed upon the box, inasmuch said door will strike against the projection f, and so throw the apparatus out of operation. ionverselynipon openingthedoor B the rod j' will be forced by the springr outwardly, thereby bringing the ring f about the insulator f in Contact with the circuitsprings f-"j", which will establish the proper circuit. Thereupon upon removing the telephone G from its handle conversation may be carried on with any desired department by pressing the proper button, the construction and electrical connections of which will be easily understood without further description.

Having` described my invention, what I claim is--- 1. ln a telephone, the combination with the case A, its door B and plate E of a telephone- -receiver C, telephone-transmitter Xa mouthpiece l.) for the transmitter, one or more pushbutton calls, and a contact maker and breaker F composed oi the proper attaching and holding' devices and the rod j', ,spring j", springcon'tacts j, j", insulator f,;holdingnut fr and contact-ringf; substantially as described and shown.

2. ,ln a telephone, the combination with the case A, door B ot' a plate E, a waterproof gasket c supporting said plate, a telephone-receiver C, telephone-transmitter X, a mouthpiece l.) for the transmitter, one or more pushbutton calls, and a contact maker and breaker F composed ot' the proper attaching and holding devices and the rod f, spring j", springcontacts j", f, insulator f3, holding-nut f and eontact-ringf; substantially as described and shown.

ln witness whereof I hereunto setA my hand this 8th day of April, 1905.'

ARTHUR. F. BOARDMAN.

In presence of )HARLES W. Wrmmxs, ALBERT D. MULLEN. 

